Schedule I - Condensed Financial information of Parent (Coupang, Inc.) - Condensed Statements of Operations and Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Income Statements, Captions [Line Items]
Total net revenues	$ 18,406,372	$ 11,967,339	$ 6,273,263
Operating cost and expenses	(19,900,334)	(12,483,333)	(6,915,186)
Interest expense	(45,358)	(107,762)	(96,907)
Other non-operating (expense) income	(10,913)	149,900	22,569
Net loss	(1,542,590)	(463,157)	(696,885)
Less: premium on repurchase of redeemable convertible preferred units	0	(92,734)	(71,415)
Net loss attributable to Class A and Class B common stockholders	(1,542,590)	(555,891)	(768,300)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	40,844	(20,730)	3,299
Actuarial loss on defined severance benefits, net of tax	(57,490)	(18,005)	(9,011)
Total other comprehensive loss	(16,646)	(38,735)	(5,712)
Comprehensive loss	(1,559,236)	(501,892)	(702,597)
Parent Company
Condensed Income Statements, Captions [Line Items]
Total net revenues	17,003	0	0
Operating cost and expenses	(349,439)	(52,067)	(21,966)
Interest expense	(21,580)	(91,035)	(79,738)
Other non-operating (expense) income	2,575	149,835	(1,110)
Loss before income taxes	(351,441)	6,733	(102,814)
Equity in losses of subsidiaries	(1,191,149)	(469,890)	(594,071)
Net loss	(1,542,590)	(463,157)	(696,885)
Less: premium on repurchase of redeemable convertible preferred units	0	(92,734)	(71,415)
Net loss attributable to Class A and Class B common stockholders	(1,542,590)	(555,891)	(768,300)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	40,844	(20,730)	3,299
Actuarial loss on defined severance benefits, net of tax	(57,490)	(18,005)	(9,011)
Total other comprehensive loss	(16,646)	(38,735)	(5,712)
Comprehensive loss	$ (1,559,236)	$ (501,892)	$ (702,597)